Tools
Child Development Assessment: Is My Toddler On Track?
A free, adaptive development check for children 1–84 months. Answer about 15 questions and see an approximate developmental age for movement, language, thinking, social and emotional skills.
Published:
This article is for general information and is not a substitute for professional medical advice. Always consult your pediatrician or doctor about your child.
Sources: WHO, CDC, AAP and NHS guidance. Recommendations differ between countries — for local advice see the NHS or CDC.
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Nothing is sent anywhere — the whole assessment runs in your browser.
What this measures
Five areas, each with its own ladder of items ordered by the age at which a typical child reaches them: movement and motor skills, language and communication, thinking and learning, social skills, and emotions and self-regulation.
Each rung is written to be passed by roughly half of children of exactly that age. That is deliberate: an item everyone passes tells you almost nothing about where a particular child sits. Screening checklists are built the other way round — they use items 75% of children pass, because their job is to catch the children who need a closer look, not to place a child on a scale.
The rungs are anchored to published norms where norms exist — WHO motor development milestones for early movement, MacArthur-Bates vocabulary norms and Denver-II for language, Denver-II problem solving for thinking, Parten's play stages for social skills. Three further areas the app measures — creativity, sensory awareness and physical activity — are left out here, because their age anchors come from descriptive literature rather than norm samples.
How to read the result
You get an approximate developmental age per area, shown as a range. Children develop unevenly across areas, and that unevenness is normal — a profile with one area ahead and another behind is far more common than a flat one.
The estimate is deliberately conservative. Two or three questions in an area cannot outweigh what is already known about a child of a given age, so each area's estimate is pulled toward your child's actual age in proportion to how much the questions actually established. This is what stops a single answer from moving the reported age by half a year.
What this cannot do: it cannot diagnose anything, it cannot see your child, and it cannot weigh the context a clinician would — prematurity, hearing, family history, how the day was going when you answered. It is a starting point for choosing activities at the right level, and a structured way to notice what you might want to raise at the next appointment.
Frequently Asked Questions
Is this a developmental screening or a diagnosis?
Neither. It is a starting point. The questions are based on parent observation, and the result is an approximate developmental age per area — not a clinical assessment. Formal screening tools are administered by a clinician who also observes your child directly. If anything here worries you, or if you had concerns before taking it, that conversation belongs with your pediatrician rather than with a web page.
Why does it ask so few questions?
Because it adapts. Instead of asking every question for every age, it starts each area at the item a child of exactly your child's age has roughly a coin-flip chance of passing — the most informative place to begin — then moves up while they clear items and down while they don't. It stops as soon as the level is bracketed. That is the same basal-and-ceiling routing used by longer instruments such as Bayley, Mullen and Brigance, and it is why about 15 questions can say more than a fixed list of 40.
Why is the result a range instead of a single number?
Because a single number would claim a precision the instrument does not have. The item rungs are two to three months apart in the first year and six months apart after age two, so the finest distinction it can genuinely make widens as children get older. A range says that honestly. It also avoids inviting you to subtract the number from your child's age and read the remainder as a deficit, which is not what it measures.
My child scored lower in one area. Should I worry?
One area sitting below the others is common and, on its own, not a cause for concern — children develop unevenly by nature, and a single answer can move an area's estimate. What is worth attention is a pattern: several areas low together, a skill your child used to have and lost, or a worry you already had before this page. Any of those is a reason to talk to your pediatrician.
Is my child's data stored anywhere?
No. The whole assessment runs in your browser — the answers are never sent to a server, nothing is saved after you close the page, and the name field is optional and used only to address the report on screen.
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